pangolin/client/lib/services/token_store.dart

// token_store.dart — JWT 令牌安全持久化（flutter_secure_storage 封装）
import 'package:flutter_secure_storage/flutter_secure_storage.dart';

class TokenStore {
  const TokenStore({FlutterSecureStorage? storage})
      : _storage = storage ?? const FlutterSecureStorage();

  final FlutterSecureStorage _storage;

  static const _kAccess = 'pangolin_access_token';
  static const _kRefresh = 'pangolin_refresh_token';

  Future<void> saveTokens({
    required String access,
    required String refresh,
  }) async {
    await _storage.write(key: _kAccess, value: access);
    await _storage.write(key: _kRefresh, value: refresh);
  }

  Future<String?> loadAccessToken() => _storage.read(key: _kAccess);
  Future<String?> loadRefreshToken() => _storage.read(key: _kRefresh);

  Future<void> clear() async {
    await _storage.delete(key: _kAccess);
    await _storage.delete(key: _kRefresh);
  }
}